Artist Christian Votteler (1840–1916)  
Description
1. Knoblauchskröte (Pelobates fuscus). 2. Springfrosch (Rana agilis). 3. Moorfrosch (Rana arvalis). 4. Grasfrosch (Rana muta). 5. Junger Grasfrosch. 6–13. Laich und Entwicklungsstufen des Grasfrosches.
Date by 1897
Medium reproduction: template:color print, original: watercolor
Source/Photographer Bruno Dürigen: Deutschlands Amphibien und Reptilien. Eine Beschreibung und Schilderung sämmtlicher in Deutschland und den angrenzenden Gebieten vorkommenden Lurche und Kriechthiere. Magdeburg, Creutz'sche Verlagsbuchhandlung 1897
Source: https://commons.wikimedia.org/wiki/File:D%C3%BCrigen,_1897,_T03.JPG

Pelobates fuscus is a species of toad in the family Pelobatidae, native to an area extending from Central Europe to Western Asia. It is commonly known as the common spadefoot, garlic toad, the common spadefoot toad and the European common spadefoot.

The agile frog (Rana dalmatina) is a frog in the genus Rana in the family of the true frogs. The agile frog can be found in France, the Channel Islands, parts of Germany, Italy, the Czech Republic, Austria, Hungary, on the Balkans, Greece, and by the Black Sea.

The moor frog (Rana arvalis) is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia. It is a member of the family Ranidae, or true frogs.

The common frog (Rana temporaria), also known as the European common frog, European common brown frog, or European grass frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as far east as the Urals, except for most of Iberia, southern Italy, and the southern Balkans.